* {
    margin: 0;
    padding: 0;
    list-style: none;
}

header {
    display: flex;
    justify-content: space-between;
    height: 50px;
    width: 100%;
    box-shadow: rgb(0 0 0 / 4%) 0px 1px 3px, rgb(0 0 0 / 8%) 0px 4px 12px;
}

header ul {
    line-height: 50px;
    display: flex;
    justify-content: space-around;
}

.f {
    margin: 0 100px;
}

.left {
    width: 50%;
}

.right {
    width: 40%;
}

body {
    background-color: #F7F8FA;
}

main {
    margin: 0 auto;
    width: 1000px;
    height: 1000px;
    background-color: aqua;
}

.mleft {
    width: 800px;
    height: 100%;
    background-color: red;
}

.mright {
    width: 200px;
    height: 100%;
    background-color: green;
}

footer {
    height: 400px;
    background-color: #1A1A1A;
}

.footertop {
    display: flex;
    justify-content: space-between;
}

.footerbottom {
    margin-top: 20px;
    color: #FFFFFF;
}

footer span {
    display: block;
    margin-top: 16px;
    color: #FFFFFF;
}

footer li {
    cursor: pointer;
    color: #7E7E7E;
    margin-top: 16px;
}

footer li:hover {
    color: #FFFFFF;
}

footer span:hover {
    color: #7E7E7E;
}

hr {
    border-color: #7E7E7E;
}

.top {
    display: flex;
    justify-content: space-between;
}

.top ul {
    width: 40%;
    display: flex;
    justify-content: space-around;
}

.top ul li {
    color: #FFFFFF;
}

.s {
    transform: translateY(15px);
}

.bottom li {
    display: inline-block;
    margin-right: 10px;
    cursor: pointer;
}

.bottom li:hover {
    color: #FFFFFF;
}